NEET Chemistry Equilibrium 2027 — Le Chatelier Principle, Kp Kc and Practice MCQs

April 12, 2026 · CUET Gurukul · NEET-2027 Blog

NEET Gurukul — Chemistry Chapter Guide

NEET 2027 Exam Relevance: Chemical Equilibrium (Class 11, Chapter 7) typically gives 3-4 questions in NEET. Le Chatelier’s Principle, Kp, Kc, and ionic equilibrium are the most tested areas.

NEET Chemistry Equilibrium 2027 — Complete Notes

Chemical Equilibrium is a crucial Physical Chemistry chapter. NEET tests both conceptual understanding (Le Chatelier’s Principle) and numerical ability (Kc, Kp calculations).

Key Formulas and Relations

Concept	Formula/Rule
Kp and Kc Relation	Kp = Kc(RT)^Δn
pH of Water	pH = -log[H⁺]; Kw = 10⁻¹⁴ at 25°C
Buffer Solution	Resists pH change — weak acid + its salt
Common Ion Effect	Decreases solubility of sparingly soluble salt
Solubility Product	Ksp = [M^n+]^m × [X^m-]^n

Le Chatelier’s Principle — Application Table

For the reaction: N₂(g) + 3H₂(g) ⇌ 2NH₃(g) + Heat

Increase pressure → Shift right (fewer moles side)
Increase temperature → Shift left (endothermic side)
Add N₂ or H₂ → Shift right
Add catalyst → Equilibrium reached faster, position unchanged
Remove NH₃ → Shift right

Ionic Equilibrium Quick Facts: Strong acids (HCl, H₂SO₄, HNO₃) — 100% ionized. Weak acids (CH₃COOH, H₂CO₃) — partial ionization. Amphoteric: Al(OH)₃, ZnO, BeO — act as both acid and base. Buffer examples: CH₃COOH + CH₃COONa (acidic), NH₄OH + NH₄Cl (basic).

[cg_quiz id=”neet-chemical-equilibrium-2027″ data=”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”]